JPS6045032B2 - Slab cutting machine with oxygen cutting - Google Patents

Description

[Detailed description of the invention] The present invention relates to a slab cutter using oxygen cutting.

A conventional oxygen cutting machine that makes straight cuts has a pair of pliers that directly support the blowpipe and move along a direct guide path.

When cutting a slab into blooms using this type of cutting machine, the blooms at both ends tend to bend because the bloom cross-sectional area is small compared to the length.

This drawback is due to the cutting shrinkage effect 1, which is well known to boiler manufacturers. If deformation occurs, the end bloom will contact the slab support member and displace the slab, resulting in a relatively curved cutting path and making the end bloom unsuitable for further processing. A device for locking the slab with a vise or the like has been proposed; however, such a locking device is impractical because the size of the bloom is significantly large. The object of the invention is to provide a machine for cutting slabs into blooms by oxygen cutting, so that the blooms on both edges have the required properties with respect to longitudinal shape and cross-section.

The slab cutting machine according to the present invention cuts a slab movably placed on a fixed support member with an oxygen cutting blowpipe supported by pliers that are movable in the slab cutting direction. A blowpipe is mounted on a table, and a self-centering device is provided on each side of the slab with a sensor cooperating, and both sensors are supported on a moving table so that they are aligned in a vertical plane parallel to the cutting direction and coinciding with the reference plane of the moving table. Each sensor is pivoted to an arm of equal length, and the other end of each arm is pivoted to the movable base at a position symmetrical to the movable base reference plane. two gears each having a mechanical coupling device fixed to the shaft of one arm and the shaft of one lever; and a rod pivotally connected to the lever and the other arm. and the rod, the other arm, and the lever constitute a parallelogram link.

Patent Publication No. 60-45032 With the above-described configuration, a change in the width or position of the slab results in a change in the position of the sensor, and the position of the movable table changes so that both planes of symmetry coincide.

By locating the blowpipe group directly through both sensors, the blowpipe passes through the true axis of the slab. If the width of the slab changes, the deviation will be equally divided between both edge blooms, which is perfect in practice.
US Pat. No. 3,001,688 describes a self-centering device for a constant width sheet through a fixed cutting device.

The two self-centering sensor rollers are each in contact with the edge of the plate and are constructed to rotate about a common vertical fixed axis, and are not always in symmetrical positions with respect to the longitudinal reference axis of the device. According to an embodiment of the invention, the sensors are runners in rolling or sliding contact with the sides of the slab, and both sensors are pivoted on arms of equal length, the other ends of the arms being symmetrical with respect to the reference plane of the moving platform. , and the arms are connected by a mechanical linkage to maintain a relative symmetrical position; the linkage includes a shaft of the same diameter, each fixed to a shaft fixed to one arm and the reversing lever, respectively. and a rod that pivots the reversing lever to the other arm, such that the four pivot pins between the reversing lever and the other arm are the vertices of the parallelogram link. do. A pneumatic cylinder device that keeps both sensors in contact with the side surface of the slab is pivoted to a moving table, and a movable member is pivoted to a reversing lever. The pneumatic cylinder device is double-acted, and both arms are placed in a separated position at the end of the pliers. In order to deactivate the self-centering device (at start-up and at the end of the cutting stroke), i.e.
When the sensor runner is in incomplete contact with both sides of the slab, the pliers include a manually or automatically operated brake as a device to lock the moving platform, and in the case of an automatic brake, the second sensor supported on the runner is attached to the side of the slab. The brake is brought into constant frictional contact 5 to set the brake to the release position, and when the slab side surface is not contacted, the second sensor operates a switch to automatically engage the brake.

Embodiments and drawings illustrating the present invention will be described.

o The figure shows a slab cutting machine 1 according to the invention, with oxygen cutting blowpipes 2, 3, 4 pointing vertically downward and cutting a slab A into four blooms a, b, c, d.

Two parallel vertical walls 7 of a concrete lower frame 6
The structure of the moving platform of the cutting machine 19 is substantially box-shaped surrounding the lateral parts of the pliers, and includes rollers guided by rails fixed to the upper part of the pliers. The slab cutting machine according to any one of the ranges 1 to 8. 10. A slab cutting machine according to claim 1, which can be selectively coupled to two motors operating at different speeds to drive the ten pliers.

11. On a movable platform movable on a guide path attached to pliers for cutting a slab movably placed on a fixed support member with at least one oxygen cutting blowpipe supported by pliers movable in the slab cutting direction. The above-mentioned blowpipe is attached to the slab, and a self-centering device having a sensor cooperating with each side of the slab is provided, and both of the above-mentioned sensors are supported on a moving table so as to be parallel to the cutting direction and perpendicular to the reference plane of the moving table. In a slab cutting machine using oxygen cutting, which is connected by a connecting device so as to always maintain a symmetrical position with respect to a plane, each of the sensors is pivoted to an arm 2r of equal length, and the other end of each arm is two gears that are pivotally supported on the movable base at symmetrical positions with respect to the movable base reference plane, and a mechanical coupling device that connects both arms is fixed to the shaft of one arm and the shaft of one lever, respectively; and the lever. and a rod pivotally connected to the other arm, respectively;
A slab cutter with oxygen cutting in which the rod, the other arm and the lever constitute a parallelogram link, and the pliers further include a device for locking the carriage and disabling the self-centering device.

12. The slab cutting machine of claim 11, wherein said locking device includes a manually actuated brake.

13 Each of the sensors includes a second sensor that is in constant contact with the side surface of the slab, so that the brake 35 is automatically tightened when the contact between the slab and the second sensor is removed at the end of the cutting process. A slab cutting machine according to claim 12.

14. The slab cutting machine according to claim 13, wherein the brake is engaged by a switch cooperating with the second sensor.

4015 On a movable platform movable on a guide path attached to pliers for cutting a slab movably placed on a fixed support member by at least one oxygen cutting blowpipe supported by pliers movable in the slab cutting direction. The above-mentioned blowpipe is attached to the slab, and a self-centering device having a sensor cooperating with each side of the slab is provided, and both of the above-mentioned sensors are supported on a moving table so as to be aligned in a vertical plane parallel to the cutting direction and coinciding with the reference plane of the moving table. In a slab cutting machine using oxygen cutting, which is connected by a connecting device so as to always maintain a symmetrical position with respect to Two gears are pivotally supported on a movable table at symmetrical positions in a plane, and a mechanical coupling device for connecting both arms is fixed to the shaft of one arm and the shaft of one lever, respectively, and and a rod pivotally connected to each arm, the rod, the other arm, and the lever forming a parallelogram link, the equipment movably supporting said slab having a plurality of spaced apart rods. 1. A slab cutter comprising a lateral girder member, the lateral girder member having a comb member having a plurality of upwardly directed indentations formed in alignment with an oxygen blowpipe.

16 A slab movably placed on a fixed support member is cut by at least one oxygen cutting blowpipe supported by pliers movable in the slab cutting direction, so that the slab is movable on a guide path attached to a pen knife. A self-centering device is installed on a movable table with a self-centering device having a self-centering mechanism that cooperates with each side of the slab. In an acid-cutting slab cutter of the type connected by a coupling device so as to always maintain a symmetrical position with respect to a vertical plane coincident with the cutting surface, each of the sensors is pivoted on an arm of equal length. , the other end of each arm is pivotally supported on the moving base at a position symmetrical to the reference plane of the moving base, and a mechanical coupling device connecting both arms is fixed to the shaft of one arm and the shaft of one lever, respectively. and a rod pivotally connected to the lever and the other arm, respectively, and the lever and the other arm form a parallelogram link groove, and each blowpipe is shaped like a parallelogram. A slab cutting machine for oxygen cutting, characterized in that the link structure is connected to a supporting arm which is held in a vertical position by a mounting member connected to the link structure and is adjustable and fixed along the displacement.

1. The slab cutting machine according to claim 16, wherein the operating position of each blowpipe with respect to the slab is determined by a contact member fixed to the V-shaped material.

The blowpipe can be lifted by a cylinder device pivotally supported on the pliers, the movable member of the cylinder device is connected to the transverse member,
Claim 1 wherein the transverse member is connected to the pliers so as to be able to act on the extension of the link forming the lever arm.
The slab cutting machine according to item 6 or 17.

! DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slab cutter with oxygen cutting.

A conventional oxygen cutting machine that makes straight cuts has a pair of pliers that directly support the blowpipe and move along a direct guide path.

When cutting a slab into blooms using this type of cutting machine, the blooms at both ends tend to bend because the bloom cross-sectional area is small compared to the length.

This drawback is due to the cutting shrinkage effect, which is well known to boiler manufacturers. If deformation occurs, the end bloom will contact the slab support member, displacing the slab, causing a relative curvature of the cutting path, and rendering the end bloom unsuitable for further processing. There is a second proposal for a device that locks the slab with a vise or the like, but if the size of the bloom is large, the size of the bloom will be significantly large, so such a locking device is not practical. The object of the invention is to provide a machine for cutting slabs into blooms by oxygen cutting, so that the blooms on both edges have the required properties with respect to longitudinal shape and cross-section.

The slab cutting machine according to the present invention cuts a slab movably placed on a fixed support member with an oxygen cutting blowpipe supported by pliers that are movable in the slab cutting direction. A blowpipe is mounted on a table, and a self-centering device is provided on each side of the slab with a sensor cooperating, and both sensors are supported on a moving table so that they are aligned in a vertical plane parallel to the cutting direction and coinciding with the reference plane of the moving table. Each sensor is pivoted to an arm of equal length, and the other end of each arm is pivoted to the movable base at a position symmetrical to the movable base reference plane. two gears each having a mechanical coupling device fixed to the shaft of one arm and the shaft of one lever; and a rod pivotally connected to the lever and the other arm. and the rod, the other arm, and the lever constitute a parallelogram link.The above-described configuration allows for changes in the width or position of the slab.15
is a change in the position of the sensor, and the position of the moving table changes so that both planes of symmetry coincide.

By placing the blowpipe group on a straight line passing through both sensors, the blowpipe passes through the true axis of the i slab. If the width of the slab changes, the deviation will be equally divided between both edge blooms, which is perfect in practice. U.S. Pat. No. 3,001,602 describes a self-centering device for a constant width sheet through a fixed cutting device.

The two self-centering sensor rollers are each in contact with the edge of the plate and are constructed to rotate about a common vertical fixed axis, and are not always in symmetrical positions with respect to the longitudinal reference axis of the device. According to an embodiment of the invention, the sensors are runners in rolling or sliding contact with the sides of the slab, and both sensors are pivoted on arms of equal length, the other ends of the arms being symmetrical with respect to the reference plane of the moving platform. , and the arms are connected by a mechanical linkage to maintain a relative symmetrical position; the linkage includes a shaft of the same diameter, each fixed to a shaft fixed to one arm and the reversing lever, respectively. and a rod that pivots the reversing lever to the other arm, such that the four pivot pins between the reversing lever and the other arm are the vertices of the parallelogram link. do.

A pneumatic cylinder device that keeps both sensors in contact with the side surface of the slab is pivoted to a moving table, and a movable member is pivoted to a reversing lever.
The pneumatic cylinder device is double-acted, and both arms are placed in a separated position at the end of the pliers. In order to deactivate the self-centering device (at start-up and at the end of the cutting stroke), i.e. when the sensor runner is in incomplete contact with both sides of the slab, the pliers can be used as a device to lock the carriage manually or Includes an automatically operated brake, and if automatic, a second brake supported on the runner.
The second sensor is brought into constant frictional contact 5 with the side surface of the slab to set the brake to the release position, and when the second sensor does not come into contact with the side surface of the slab, the second sensor operates a switch to automatically apply the brake.

Embodiments and drawings illustrating the present invention will be described.

O The figure shows a slab cutting machine 1 according to the invention, in which the oxygen cutting blowpipe 2, 3, 4 points vertically downward and cuts a slab A into four blooms A, b, c, d.

Two parallel vertical walls 7 of a concrete lower frame 6
The cutting machine 1 is supported on two rails 8 fixed to the upper part of the machine. Two supporting walls 1 are formed in the lower part between the vertical walls 7, fill the bit 9 with water, and disturb the side walls of the bit 9.
2 supports two spaced apart girders 11. A comb-shaped block 13 is supported on each girder 11. The plurality of dents 14 of the block 13 face upward, and some of the dents 14
correspond to the respective oxygen cutting blowpipe 2, 3, 4. The slab A to be cut is movably supported on a plurality of blocks 13 spaced apart in the longitudinal direction. The pliers 16 of the cutting machine 1 are movable in the longitudinal direction and have a planar U shape, and rollers 18 and 19 are supported at the lower part of the legs 17 of the U so as to be rotatable on a rail 8 about a horizontal axis. Furthermore, for the lateral guidance of the pliers 16, a roller 21 rotating about a vertical axis is provided.
contacts both sides of the rail 8. Legs 1 on both sides of pliers 16
7 are interconnected at the front by a gargoo 23. The girder 23 forms an overhead crane, and the box-shaped members 24 on the four sides form a lattice structure as shown in FIG. pliers 1
6, a shaft 26 extends within the girder 23 and connects to the front roller 19. The shaft 26 is selectively coupled to motors 27, 28 of different speeds to move the pliers 16 at a slow speed in the cutting direction and at a fast speed in the return direction. Arrow f indicates the cutting direction. The blowpipes 2, 3, and 4 are not directly attached to the straight girder 23 of the pliers 16, but are attached to a moving table 29.

The movable base 29 is movable relative to the girder 23 in the longitudinal direction, and the frame of the movable base surrounds the girder 23 in an approximately S box-shaped structure as shown in FIG.
2, 33, 34. An L supporting two sets of inclined rollers 36 on the upper part 31 and welded to the upper surface of the garter 23
It rotates along the mold member 37. The roller 38 is attached to the upper part 3
1, has a horizontal axis, and rotates on a rail 39 welded to the top surface of the girder 23. A roller 41 supported on the vertical front side 32 of the carriage 29 has a horizontal axis;
It comes into contact with the lower surface of the protruding leg of the L-shaped member 42 welded to the girder 23. Each blowpipe 2, 3, 4 is fixed in a vertical position within a yoke 43.

Links 4≦4, 46 are pivotally supported on the bracket of the yoke 43 to keep the yoke 43 vertical as a parallelogram. Support arm 4
The rear ends of links 44 and 46 are pivotally supported on the front end 45 of 7. A support arm 47 is supported at the lower part of the movable table 29 so that its relative position can be adjusted in the moving direction of the movable table. For this purpose, support arm 47
The rear end is slidable in a guideway 48 attached to the lower side 33 of the carriage and supports a roller 49 having a horizontal axis at the front end 45 of the support arm 47. The roller 49 is guided along the edge of the upwardly bent edge 51 of the horizontal flange of the L-shaped member 52 welded to the front side 32 of the moving table 29. Support arm 4
A screw 53 carried on the front end 45 of 7 contacts the horizontal flange of the L-shaped member 52 to restrain the support arm 47 in position.
9 The contact member 55 for keeping each blowpipe 2, 3, 4 at a required distance from the slab A is in the shape of a compass that opens downward, and the pins 54, 56 that attach the top of the member 55 are connected to the yoke 4.
3 is used as a pin for pivotally supporting links 44 and 46.

A roller 58 having support gates at the ends of both legs of the contact member 55 makes rolling contact with the upper surface of the slab. The upper link 44 extends rearward beyond the rear pivot pin 59 to form a lever arm 61.
Support arm 63 of roller 62 extending the entire length of girder 23
is pivotally supported by a pivot pin 64 attached to the front lower member of the girder 23. The lever arm 61 comes into contact with the lower end of the roller 62, and when the lever arm 61 is pushed down, the blowpipe 2, 3, 4 is raised. For this purpose, a bracket 6 fixed to the upper side of the girder 23 is used.
The tab 66 of the support arm 63 is pivoted to the free end of the rod 67 of the cylinder device 68, which is pivoted at 9. When the cylinder device 68 is extended, the seventh roller 62 is lowered and the blowpipe is moved upward. The moving platform 29 has a vertical plane of symmetry XX, in which plane the central blowpipe 3 is mounted.

The other blowpipes 2 and 4 are normally 114 slab width from the central blowpipe 3.
Installed at a distance of ? Ru. Therefore, the central bloom B,c
is a constant width. However, due to actual changes in slab width, the end blooms A and d do not have a constant width. Is it possible to divide this change in width equally into both end blooms A and d, and divide it accurately even if there is deviation on the support member of the slab? ! For this purpose, a self-centering device is provided according to the invention. The purpose of the self-centering device is to allow the movable base to freely move in a direction perpendicular to the direction of the slab, so that the plane of symmetry XX of the movable base 29 while advancing the pliers 16 always coincides with the right symmetry plane YY of the slab. The direction of movement of the pliers 16 'C is such that the slab is damaged along the locus of the center of the slab in the direction perpendicular to this.
1 is arranged symmetrically, and comes into rolling contact with both side surfaces 72 of slab A].

- The sensor runner 71 is pivoted to an arm 74 by a pin 73, and the two arms 74 are of equal length and the other end is connected to the moving table 2.
9 is pivotally supported by vertical pins 76 and 77 at both ends. 2
A mechanical coupling device is provided to move the book arm 74 symmetrically with respect to the vertical plane XX.

Vertical pins 76 and 77 are supported by brackets 78 attached to both ends of the movable table 29 and extend above the movable table.
A gear 79 is fixed to the extension of the pin 76 as shown on the left side of FIGS. 1 and 2. A gear 81 meshing with the gear 79 has the same diameter and is fixed to a shaft 82. The shaft 82 is in the same plane laterally to the pin 76 and secures one end of the reversing lever 83. As a result, the reversing lever 83 is moved to the left arm 74.
rotate in the opposite direction at the same angle. A connecting port (one end of the rod 86 is pivotally supported by a pin 84 in the middle part of the lever 83, and the other end of the rod 86 is connected to the right arm 7 by a pin 87.
Supports 4. Thus, pins 82, 84, 77, 87
form each vertex of a parallelogram link. Connecting rod 8
6 is parallel to the moving direction of the moving table 29, and two arms 74
is with respect to plane XX? maintain the name. In order to keep the sensor runner 71 in contact with the slab side surface 72, a double-acting pneumatic cylinder device 88 is pivoted between the other end 89 of the lever 83 and a bracket 91 fixed to the top of the carriage.

At the end of the movement of the pliers 16, both sensor runners 71 may not reliably contact both side surfaces 72 of the slab.

At this time, the moving carriage 29 must be insensitive to the action of the self-centering device. This is the brake 92 shown in FIG.
This is the reason. The brake 92 has a yoke 93 fixed to the side part 34 of the moving table 29 and a vertical plate 86 fixed to the rear lower member 24 of the girder 23 of the pliers 16. Board 8 by control
6 to produce brake pressure. sensor runner 71
When the girder reaches the longitudinal end of the slab, the brake 92 is operated manually or automatically to fix the relative position of the movable platform and the girder. For automatic operation of the brakes 92, a second sensor 97 is attached to each sensor runner 71, as shown in FIG.

The second sensor 97 is a bent plate, and the side wall 99 of the runner
It is pivotally supported by a pin 98 supported by. Straight section of board 1
01 forms a sliding element and maintains contact with the slab side 72 by means of a spring 105. Thus, the opposite end 102 of the pin 98 holds the knob 103 of the switch 104 in the depressed position, the brake 92 is released, and the carriage 29 is free to move relative to the girder. The second sensor 97
2, the spring 105 pushes the sensor 97 and rotates it away from the knob 103. Therefore, the brake circuit is activated to engage the brake 92 and lock the carriage to the girder. According to a preferred embodiment, switch 10
4 controls the brake circuit and also controls the air pressure supply circuit of the pneumatic cylinder device 88. When the knob 103 is pressed, the sensor runner 71 is pressed against the slab side surface 72, and when the sensor runner 71 leaves the slab, the knob 10 is pressed.
3 protrudes and reverses the movement of the cylinder device 88 to release the arm 7.
Make 4 go away.

If one of the two second sensors 97 detects the end of the slab at the final stage of cutting, the brake 92 is engaged and the movable table does not move irregularly. The remaining approximately 10cm is cut in a straight line in accordance with the movement of the girder, so there is no need for the operator to make any adjustments. In combination with this automatic device, it is also possible to provide a device that automatically stops the cutting machine after a certain time delay. When starting slab cutting work, the arm 74 opens and the brake 9
2 fixes the moving table 29.

The operator aligns the machine with the first end of the slab and applies brake 9.
2 is released, the arm 74 is closed by the pneumatic cylinder device 88, and the center of the moving table is aligned with the center of the slab. The carriage is locked by brake 92, arm 74 is released, and the machine is returned to the starting position. At the beginning of the cutting operation, the movable table maintains its initial adjusted position relative to the girder. When the cutting progresses to a range where the sensor runner 71 can come into contact with both side surfaces 72 of the slab, the self-centering device is activated to automatically operate. The arm 74 is closed, and when the second sensor 97 detects the presence of 5 slabs, the brake 92 is released and the steady cutting operation is started. Clinker produced by oxygen cutting is bit 9
It falls into the water and becomes granular, which is collected by a scraper (not shown) and discharged by a grab bucket.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of a slab cutting machine according to the present invention, FIG. 2 is a partially enlarged plan view of FIG. 1, and FIG.
4 and 5 are enlarged views of the sensor runner of the cutting machine shown in FIG. 1. 1: Slab cutting machine, 2, 3, 4: Oxygen cutting blowpipe, 8: Rail, 9: Pit, 11, 23: Girder, 13: Comb type block, 16: Bench, 27, 28: Motor, 29:
Moving table, 47: Support arm, 55: Contact member, 71: Sensor runner, 74: Arm, 83: Reversing lever, 88: Pneumatic cylinder device, 92: Brake, 97: Second sensor.

Claims (1)

[Scope of Claims] 1. In order to cut a slab movably placed on a fixed support member by means of at least one oxygen cutting blowpipe supported on a bench movable in the slab cutting direction, a guideway mounted on a bench is provided. The blowpipe is mounted on a movable movable table, and a self-centering device having a sensor that cooperates with each side of the slab is provided, and both sensors are supported on the movable table so that the movable table reference plane is parallel to the cutting direction. In an oxygen cutting slab cutter of the type connected by a coupling device so as to always maintain a symmetrical position with respect to a vertical plane corresponding to The other end is pivoted on the movable base at a position symmetrical to the movable base reference plane, and the mechanical coupling device connecting both arms is connected to two gears fixed to the shaft of one arm and the shaft of one lever, respectively. , a slab cutting machine using oxygen cutting, comprising a rod pivotally connected to the lever and the other arm, the rod, the other arm, and the lever forming a parallelogram link. . 2. The slab cutting machine according to claim 1, wherein the vertical reference plane is a plane of symmetry of the movable table. 3. The slab cutting machine according to claim 1 or 2, wherein the sensor is arranged on the same plane as the blowpipe nozzle row. 4. The slab cutting machine according to claim 1, 2, or 3, wherein the sensor is a sliding member that slides into contact with the side surface of the slab. 5. The slab cutting machine according to claim 1, 2, or 3, wherein the sensor is a rolling member that makes rolling contact with the side surface of the slab. 6. The slab cutting machine according to any one of claims 1 to 5, which includes an elastic flexible device such as a pneumatic cylinder device that brings the sensor into pressure contact with the side surface of the slab. 7. Claim 1, wherein the movable element of the cylinder device presses the reversing lever by the pneumatic cylinder device supported on the moving table and presses both sensors against the side surface of the slab during work.
Slab cutting machine as described in section. 8. The slab cutting machine according to claim 7, wherein the pneumatic cylinder device is double-acted to move both sensors in a direction that separates them from each other. 9. The structure of the moving platform is substantially box-shaped surrounding the lateral portion of the bench, and includes rollers guided by rails fixed to the upper part of the bench. Slab cutting machine as described. 10 2 operating at different speeds to drive the bench
Claim 1: It is possible to selectively connect the motor to the motor.
The slab cutting machine according to any one of Items 1 to 9. 11. On a movable platform movable on a guideway attached to a bench for cutting a slab movably placed on a fixed support member by means of at least one oxygen cutting blowpipe supported on a bench movable in the direction of slab cutting. The above-mentioned blowpipe is attached to the slab, and a self-centering device having a sensor cooperating with each side of the slab is provided, and both the above-mentioned sensors are supported on a moving table so as to be aligned in a vertical plane parallel to the cutting direction and coinciding with the reference plane of the moving table. In a slab cutting machine using oxygen cutting, which is connected by a connecting device so as to always maintain a symmetrical position with respect to Two gears are pivotally supported on a movable table at symmetrical positions in a plane, and a mechanical coupling device for connecting both arms is fixed to the shaft of one arm and the shaft of one lever, respectively, and a rod pivotally connected to the arm and the lever, the rod, the other arm, and the lever forming a parallelogram link; Slab cutting machine with oxygen cutting, including equipment for operation. 12. The slab cutting machine according to claim 11, wherein the locking device includes a manually actuated brake. 13 Each of the above-mentioned sensors has a second sensor that is in constant contact with the side surface of the slab.
13. The slab cutting machine according to claim 12, wherein the brake is automatically applied when the slab comes out of contact with the second sensor at the end of the cutting process. 14. The slab cutting machine according to claim 13, wherein the brake is engaged by a switch cooperating with the second sensor. 15. On a movable platform movable on a guideway attached to a bench for cutting a slab movably placed on a fixed support member by means of at least one oxygen cutting blowpipe supported on a bench movable in the direction of slab cutting. The above-mentioned blowpipe is attached to the slab, and a self-centering device having a sensor cooperating with each side of the slab is provided, and both of the above-mentioned sensors are supported on a moving table so as to be aligned in a vertical plane parallel to the cutting direction and coinciding with the reference plane of the moving table. In a slab cutting machine using oxygen cutting, which is connected by a connecting device so as to always maintain a symmetrical position with respect to Two gears are pivotally supported on a movable table at symmetrical positions in a plane, and a mechanical coupling device for connecting both arms is fixed to the shaft of one arm and the shaft of one lever, respectively, and and a rod pivotally connected to each arm, the rod, the other arm, and the lever forming a parallelogram link, wherein the device movably supporting said slab includes a plurality of spaced apart laterals. A slab cutter comprising a directional girder member, the lateral girder member having a comb-shaped member having a plurality of upwardly directed indentations formed in alignment with the oxygen blowpipe. 16. A movable platform movable on a guideway mounted on a bench for cutting a slab movably placed on a fixed support member by means of at least one oxygen cutting blowpipe supported on a bench movable in the direction of slab cutting. The above-mentioned blowpipe is mounted on the slab, and a self-centering device having a sensor cooperating with each side of the slab is provided, and both of the above-mentioned sensors are supported on a moving table to form a vertical plane parallel to the cutting direction and coinciding with the reference plane of the moving table. In a slab cutting machine using oxygen cutting, which is connected by a connecting device so as to always maintain a symmetrical position with respect to two gears that are pivoted on a movable table in symmetrical positions with respect to a reference plane, and a mechanical coupling device that connects both arms is fixed to the shaft of one arm and the shaft of one lever, respectively; and a rod pivotally connected to each arm, the rod, the other arm, and the lever forming a parallelogram link, each blowpipe being connected by a mounting member to the parallelogram link structure. A slab cutting machine using oxygen cutting, characterized in that a link structure is connected to a support arm that is adjustable and fixed along a movable table and maintained in a vertical position. 17 The operating position of each blowpipe with respect to the slab is defined by a contact member fixed to the mounting member, claim 1.
The slab cutting machine described in item 6. 18 The blowpipe is made liftable by means of a cylinder arrangement pivoted on the bench, the movable member of the cylinder arrangement being connected to the transverse member and the extension of the link connecting the transverse member to the bench forming the lever arm. A slab cutting machine according to claim 16 or 17, which is capable of operating.